Portion of a firearm barrel



FIG. 1 is an isometric view of a first embodiment of the firearm barrel;

FIG. 2 is a top plan view thereof, the bottom view being the same;

FIG. 3 is a side plan view thereof, both side views being the same;

FIG. 4 is an end plan view thereof, both end views being the same;

FIG. 5 is an isometric view of a second embodiment the firearm barrel;

FIG. 6 is a top plan view thereof, the bottom view being the same;

FIG. 7 is a side plan view thereof, both side views being the same; and,

FIG. 8 is an end plan view thereof, both end views being the same.

The opposing ends of the claimed design in FIGS. 1-8 indicate that no specific distance end to end is claimed.

Matter shown in broken line forms no part of the claimed design. 

CLAIM The ornamental design for a portion of a firearm barrel, as shown and described. 